Who would you even pick? Assuming Limiteds aren't available i would be pretty split between Monomasa and Andrew.
Monomasa is probably the best Single Target Attacker in the game with good Pubraseer synergy to boot and Andrew has good kit (His S1 being Provoke means he doesn't need a Auto Skill if you gonna use him for a Auto Team) and good element for tanking (Since Neutral to everything but Nether since we we don't have Valiant/Infernal/World). So both are good "Meta" Picks for me.
If Limited is available then Slut Ryekie should be a no brainer though.
For 4* i would just pick Barrel because i still haven't pulled him.